Card-type storage device having heat dissipation structure and slot device

ABSTRACT

A card-type storage device and a slot device, which are capable of preventing lowering of the reliability due to repeated insertion and removal of the storage device. A card medium includes card thermal contacts each having a contact surface which intersects with a thickness direction of the card medium. A first card upper guide surface restricts the position of the card medium in the thickness direction to a first position. An escape portion restricts the position of the card medium in the thickness direction to a different position from the first position. A second card upper guide surface links the first card upper guide surface and the escape portion.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a card-type storage device, such as amemory card, and a slot device into which the card-type storage deviceis inserted, and more particularly to a structure for dissipating heatfrom the card-type storage device.

Description of the Related Art

A card-type storage device (hereinafter referred to as the card medium),such as a memory card, is widely used as a medium for recordinginformation (such as data) in electronic apparatuses, such as portabledevices. In recent years, there has been known such a card medium whichis configured to read and write information at high speed. Particularly,in a case where a digital camera as one of the electronic apparatusesperforms moving image shooting, as image definition is made higher, thetransfer rate of image data has to be increased, that is, it isnecessary to perform writing of image data at high-speed.

In general, as the transfer rate of data becomes higher, powerconsumption in a card medium becomes larger, which increases heatgeneration. Therefore, heat transfer via electrical contacts and naturalconvection are not effective enough to exhaust heat from the cardmedium, which sometimes prevents the apparatus from normally operatingdue to increased temperature.

On the other hand, there has been proposed a device in which a heatconductive material is provided in a card medium so as to effectivelyexhaust heat from the card medium (see Japanese Laid-Open PatentPublication (Kokai) No. 2011-95961). In Japanese Laid-Open PatentPublication (Kokai) No. 2011-95961, part of a card case or a slot device(referred to as the card slot), into which a card medium is inserted, isbrought into contact with a heat dissipation path extending from theheat conductive material to thereby promote heat dissipation.

Further, there has been proposed a heat transfer connector configured toconnect a device having a heat generation source and a device as a heatdissipation destination by a cylindrical protrusion made of metallicmaterial, and arrange a tubular contact, which is elastic and has heatconductive fluid sealed therein, in at least one of the devices(Japanese Laid-Open Patent Publication (Kokai) No. 2000-283620).

However, according to Japanese Laid-Open Patent Publication (Kokai) No.2011-95961, the card medium and the card slot are connected via acontact. Therefore, although the reliability is ensured provided thatthe contact has a spring property, the card medium and the card slot arebrought into linear contact with each other, which reduces thermalconductivity. On the other hand, if the contact has no spring property,although thermal conductivity is improved, when the card medium isrepeatedly inserted and removed, contact between the card medium and thecard slot becomes unstable, which lowers the reliability.

In Japanese Laid-Open Patent Publication (Kokai) No. 2000-283620,although thermal conductivity is improved by surface contact, since thetubular contact having the heat conductive fluid sealed therein is used,the disclosed mechanism of the heat conductive connector is low inreliability for the card medium which is repeatedly inserted andremoved.

SUMMARY OF THE INVENTION

The present invention provides a card-type storage device and a slotdevice, which are capable of preventing lowering of the reliability dueto repeated insertion and removal of the card-type storage device, andthereby improving thermal and electrical connection therebetween.

In a first aspect of the present invention, there is provided acard-type storage device comprising a first thermal contact having acontact surface which intersects with a thickness direction of thecard-type storage device, a first restriction portion that restricts aposition of the card-type storage device in the thickness direction to apredetermined first position, a second restriction portion thatrestricts the position of the card-type storage device in the thicknessdirection to a predetermined second position which is different from thepredetermined first position, and a third restriction portion that linksthe first restriction portion and the second restriction portion.

In a second aspect of the present invention, there is provided a slotdevice into which and from which a card-type storage device is insertedand removed, wherein the card-type storage device includes a firstthermal contact having a contact surface which intersects with athickness direction of the card-type storage device, a first restrictionportion that restricts a position of the card-type storage device in thethickness direction to a predetermined first position, a secondrestriction portion that restricts the position of the card-type storagedevice in the thickness direction to a predetermined second positionwhich is different from the predetermined first position, and a thirdrestriction portion that links the first restriction portion and thesecond restriction portion, the slot device comprising an urging portionthat urges, when the card-type storage device is inserted, the card-typestorage device in the thickness direction, a second thermal contact thathas a contact surface intersecting with the thickness direction of thecard-type storage device, and is brought into contact with the firstthermal contact, a first guide portion that cooperates with the firstrestriction portion to restrict the position of the card-type storagedevice in the thickness direction to the predetermined first position, asecond guide portion that cooperates with the first restriction portionto restrict the position of the card-type storage device in thethickness direction to the predetermined second position, and a thirdguide portion that links the first guide portion and the second guideportion.

According to the present invention, it is possible to prevent loweringof the reliability due to repeated insertion and removal of a card-typestorage device, and thereby improve thermal and electrical connection.

Further features of the present invention will become apparent from thefollowing description of exemplary embodiments (with reference to theattached drawings).

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram showing an example of an electronic apparatus inwhich a card-type storage device (card medium) according to a firstembodiment of the present invention is used.

FIGS. 2A and 2B are block diagrams of examples of configurations of thecamera and the card medium shown in FIG. 1, respectively.

FIGS. 3A and 3B are diagrams useful in explaining insertion of the cardmedium shown in FIG. 2B into a memory section appearing in FIG. 2A.

FIGS. 4A to 4E are diagrams useful in explaining the configuration ofthe card medium appearing in FIGS. 3A and 3B.

FIGS. 5A to 5D are diagrams useful in explaining the arrangement of thecomponents in a thickness direction of the card medium shown in FIGS. 4Ato 4E.

FIGS. 6A to 6D are diagrams useful in explaining the inserted andremoved states of the card medium shown in FIGS. 4A to 4E.

FIGS. 7A and 7B are diagrams useful in explaining details of the cardmedium and a slot according to the first embodiment.

FIGS. 8A to 8D are diagrams useful in explaining the contact andseparation states of the card medium and the slot shown in FIGS. 7A and7B.

FIGS. 9A and 9B are diagrams useful in explaining a card medium and aslot according to a second embodiment of the present invention.

FIGS. 10A to 10E are diagrams useful in explaining the configuration ofthe card medium appearing in FIGS. 9A and 9B.

FIGS. 11A and 11B are diagrams useful in explaining details of the cardmedium and the slot according to the second embodiment.

FIGS. 12A to 12D are diagrams useful in explaining the arrangement ofthe components in the thickness direction of the card medium shown inFIGS. 10A to 10E.

DESCRIPTION OF THE EMBODIMENTS

The present invention will now be described in detail below withreference to the accompanying drawings showing embodiments thereof. Thefollowing description will be given of an example of a card-type storagedevice and a slot device into which and from which the card-type storagedevice is inserted and removed, according to embodiments of the presentinvention.

FIG. 1 is a diagram showing an example of an electronic apparatus inwhich a card-type storage device according to a first embodiment of thepresent invention is used.

The illustrated electronic apparatus is an image pickup apparatus, suchas a digital camera (hereinafter simply referred to as the camera), andthe illustrated camera includes a camera body 1 in which one of aplurality of lens units 2 is selectively mounted via an interface 3provided on the camera body 1. The camera body 1 is provided with anoperation section 4 (one of components thereof is indicated by referencenumeral 4 in FIG. 1) for operating the camera. For example, a userperforms operations for shooting and recording a moving image via theoperation section 4. A card-type storage device (hereinafter referred toas the card medium) 5 for recording e.g. image data is mounted in thecamera body 1. The card medium 5 is inserted into and removed from aslot device (hereinafter simply referred to as the slot) 31, describedhereinafter, which is provided in the camera body 1, as needed.

For example, when editing image data (such as a moving image file)recorded in the card medium 5, the user removes the card medium 5 fromthe camera body 1, and inserts the same into a card reader 6. Note thatthe card reader 6 is also provided with a slot for inserting the cardmedium 5. The card reader 6 is connected to a personal computer (PC) 8via a cable 7, and the user causes the PC 8 to read the image data fromthe card medium 5, and edits the image data.

As described above, the card medium 5 is inserted into or removed fromthe camera body 1 or the card reader 6 as needed. Note that in thepresent example, the card medium 5 refers to a medium formed into a thinflat shape for the purpose of portability and findability (easiness inattaching a label or the like thereto).

FIGS. 2A and 2B are block diagrams of examples of configurations of thecamera and the card medium shown in FIG. 1, respectively. FIG. 2A is ablock diagram of the camera, while FIG. 2B is a block diagram of thecard medium. Note that the same components in FIGS. 2A and 2B as thosein FIG. 1 are denoted by the same reference numerals.

First, referring to FIG. 2A, the camera body 1 includes a camera systemcontrol circuit (hereinafter referred to as the camera control circuit)10, and the camera control circuit 10 controls the overall operation ofthe camera. The operation section 4 includes a release button, and soforth, and the camera control circuit 10 performs image pickup controlaccording to an operation of the release button. An optical image isformed on an image pickup device 12 via a photographic optical system 22provided in the lens unit (hereinafter simply referred to as the lens)2. Then, the image pickup device 12 outputs image signals correspondingto the optical image.

A lens system control circuit (hereinafter referred to as the lenscontrol circuit) 20 controls driving of a lens driving section 21 toadjust the photographic optical system 22, under the control of thecamera control circuit 10. For example, the lens control circuit 20controls driving of the photographic optical system 22 such that animage forming plane where an image is formed by the photographic opticalsystem 22 is brought to a position of the image pickup device 12(so-called focusing). Further, the lens control circuit 20 controls anaperture based on the level of the image signals. Further, the cameracontrol circuit 20 adjusts brightness by controlling charge accumulationin the image pickup device 12 based on the level of the image signals(so-called exposure control).

Image signals as an output from the image pickup device 12 are sent toan image processor 13. The image processor 13 includes ananalog-to-digital converter, a white balance adjustment circuit, a gammacorrection circuit, an interpolation calculation circuit, and so forth,none of which are particularly shown. The image processor 13 performspredetermined image processing on the image signals to thereby generateimage data under the control of the camera control circuit 10. Then, thecamera control circuit 10 displays an image corresponding to thegenerated image data on a display section 14. Further, the imageprocessor 13 compresses e.g. image data by a predetermined method, andrecords the compressed image data in a memory section 11. Note that whenmoving image shooting is performed as mentioned above, a moving imagefile is recorded in the memory section 11.

The memory section 11 is provided with a storage section and the slot31. The card-type storage device (card medium) 5 is inserted into theslot 31. The image processor 13 records e.g. a moving image file in thecard medium 5 under the control of the camera control circuit 10.

When an operation of a release button as the one of the components ofthe operation section 4 is detected, the camera control circuit 10drives the image pickup device 12, and causes the image processor 13 tooperate, to thereby control compression processing and so forth.Further, the camera control circuit 10 displays information indicativeof a state of the camera and the like on the display section 14.

The camera control circuit 10 determines a focus position and adiaphragm position of the photographic optical system 22 based on theimage data generated according to the image signals as an output fromthe image pickup device 12. Then, the camera control circuit 10 controlsthe lens control circuit 20 via the interface (I/F) 3 to control drivingof the lens driving section 21. Thus, focusing and exposure control areperformed.

As shown in FIG. 2A, a heat transfer section 15 provided on the camerabody 1 is thermally connected to the image processor 13 and the memorysection 11. The heat transfer section 15 is formed e.g. by a heat pipeor a graphite sheet. The heat transfer section 15 thermally connects theimage processor 13 and the memory section 11, which are representativeheat sources in the camera body 1, to heat dissipation part (an exteriorand the like of the camera body 1). As a result, heat is dissipated fromthe camera body 1 to the outside by natural convection and radiation viathe heat transfer section 15 as indicated by arrows 16 in FIG. 2A.

Next, referring to FIG. 2B, the card medium 5 includes a power supply IC27, a card controller IC (also referred to as the controller) 28, and aflash memory 29. The card medium 5 is connected to a power supply 24 anda host controller 25 via a card interface (I/F) 26. Note that the powersupply 24 appearing in FIG. 2B is a power supply provided in the camerabody 1, and the host controller 25 is the camera control circuit 10appearing in FIG. 2A. Further, although FIG. 2B shows one flash memory29, the plurality of flash memories 29 may be provided.

The specifications of the physical structure of the card interface 26,signal lines, and so forth, are defined as standards of the card medium5 in advance. The card interface 26 is provided with power supplycontacts for power supply, signal contacts for information transmission,and thermal contacts for heat transfer, described hereinafter. The powersupply contacts connect between the power supply 24 and the power supplyIC 27, and the signal contacts connect between the host controller 25and the controller 28.

The power supply IC 27 controls the voltage of the power supply 24 to avoltage level required by the controller 28 and the flash memory 29. Thecontroller 28 performs error correction, block management, wearleveling, and so forth. Further, the controller 28 includes interfaces,not shown, for the host controller 25 and the flash memory 29. Withthis, the controller 28 records data sent from the host controller 25 inthe flash memory 29, and further, sends the data recorded in the flashmemory 29 to the host controller 25.

After the card medium 5 is connected to the memory section 11 (i.e.inserted into the slot 31), the host controller 25 is capable ofrecording a moving image file in the card medium 5 via the memorysection 11. Further, the host controller 25 is capable of reading amoving image file from the card medium 5 to reproduce and display themoving image file on the display section 14.

FIGS. 3A and 3B are diagrams useful in explaining insertion of the cardmedium 5 shown in FIG. 2B into the memory section 11 appearing in FIG.2A. FIG. 3A is a diagram showing a relationship between the camera andthe card medium 5, and FIG. 3B is a perspective view of the slot 31provided in the memory section 11 appearing in FIG. 2A in an explodedstate.

First, referring to FIG. 3A, the operation section 4 is provided with acover operation switch 4 a for opening a slot door 30. When insertingthe card medium 5 into the camera body 1, the user operates the coveroperation switch 4 a. By this operation, a hook 30 a provided on theslot door 30 is disengaged, whereby the slot door 30 is opened to exposethe slot 31. Then, the user inserts the card medium 5 into the slot 31.

The slot 31 is provided with an eject mechanism, and when the cardmedium 5 is inserted, an eject button 46 protrudes outside the camerabody 1. Note that in the illustrated example, the two card media 5 ofthe same type or different types can be inserted in parallel. That is,the slot 31 is provided as two slots 31 arranged side by side.

When the slot door 30 is closed after the card medium 5 has beeninserted into the slot 31, the camera control circuit 10 and the cardmedium 5 are capable of communicating with each other. The camera body 1is provided with a detection switch, not shown, for detecting openingand closing of the slot door 30. When closing of the slot door 30 isdetected, the camera control circuit 10 checks whether or not the cardmedium 5 is present, and if the card medium 5 is present, the cameracontrol circuit 10 becomes capable of communicating with the card medium5. On the other hand, when opening of the slot door 30 is detected, thecamera control circuit 10 performs processing for immediatelyterminating recording of image data, and so forth.

To remove the card medium 5 from the slot 31, the user operates theoperation switch 4 a. This operation causes the hook 30 a provided onthe slot door 30 to be disengaged, whereby the slot door 30 is opened.After that, when the user pushes in the eject button 46, the card medium5 is pushed out to a position where the user can easily pinch the cardmedium 5. By holding an end portion of the card medium 5 and pulling thecard medium 5 toward the near side, the user can remove the card medium5. The above-described operation concerning the ejection of the cardmedium 5 will be described in detail hereinafter.

Referring to FIG. 3B, the slot 31 includes a slot substrate 41. On theslot substrate 41, there is arranged a slot base 42. On the slot base42, there is disposed a slot connector 42 a, and further, there aredisposed a slot-left-side guide portion 42 b and a slot-right-side guideportion 42 c. The slot-left-side guide portion 42 b and theslot-right-side guide portion 42 c are opposed to each other across theslot connector 42 a with a predetermined spacing therebetween.

A plurality of slot electrical contacts 43 are press-fitted in the slotbase 42 and held thereon. The slot electrical contacts 43 includepower-supply slot electrical contacts 43 a and communication slotelectrical contacts 43 b for transmitting information. Further, aplurality of slot thermal contacts (second thermal contacts) 44 arepress-fitted in the slot base 42 and held thereon. The slot thermalcontacts 44 are exposed from the slot base 42 both in inserting andremoving directions of the card medium 5.

Further, a slot cover 45 is engaged with the slot base 42, and the ejectbutton 46 is disposed on the slot cover 45. Further, the ejectmechanism, denoted by reference numeral 47, is provided on the slotcover 45. The card medium 5 is inserted into the slot 31 in a directionindicated by an arrow 50 in FIG. 3B. The card medium 5 has a left sidesurface provided with a card-left-side guide portion 55 a, and a rightside surface provided with a card-right-side guide portion 56 a, asviewed in the inserting direction of the card medium 5.

As described above, the slot 31 includes the slot base 42, the slotelectrical contacts 43, the slot thermal contacts 44, and the slot cover45.

The slot base 42 is molded of LCP (liquid crystal polymer) from theviewpoints of a heat resisting property high enough resist reflowsoldering, thinness for forming a compact and thin shape, flowabilitythat enables formation of a complicated shape, slidability, and soforth. Each slot electrical contact 43 is molded by performingpredetermined plating (such as gold plating) on phosphor bronze from theviewpoints of a spring property for bringing itself into contact with amating contact, solder wettability, contact electric resistance, and soforth. Each slot thermal contact 44 is formed by performingpredetermined plating (such as hard chrome plating) on pure copper orcopper alloy from the viewpoints of thermal conductivity, slidability,wear resistance, and so forth. The slot cover 45 is formed by stainlessspring steel from the viewpoints of strength in a thinned state,workability, corrosion resistance, and so forth.

The plating-coated portion of the slot thermal contact 44 has thermalconductivity lower than that of pure copper or copper alloy, but issufficiently small in thickness (normally, several micrometers), andhence there is no problem in its thermal resistance. On the other hand,it is possible to largely improve hardness of the surface by using e.g.hard chrome plating. That is, it is possible to form a thermal contacthaving high reliability, which is less prone to scratching when the cardmedium 5 is inserted and removed. The thermal contact forms a guidesurface and is slid, as described hereinafter, and hence it is of greatsignificance to increase the surface hardness thereof.

The card medium 5 is inserted in the direction indicated by the arrow 50while being roughly positioned by the slot cover 45 (while being guidedwith slight play). After that, the card medium 5 is precisely positionedby the card-left-side guide portion 55 a and the slot-left-side guideportion 42 b, and the card-right-side guide portion 56 a and theslot-right-side guide portion 42 c, and is inserted to a communicableposition. Finally, the card medium 5 is inserted to a position where acard abutment surface 42 d, referred to hereinafter, on the slot base 42and a terminal surface 51, referred to hereinafter, of the card medium 5are brought into contact with each other. At this position, the slotelectrical contacts 43 and card electrical contacts, referred tohereinafter, are brought into contact with each other, whereby stablecommunication is enabled.

As shown in FIG. 3B, the slot thermal contacts 44 are provided in twowhich are arranged with a predetermined spacing therebetween, and theplurality of slot electrical contacts 43 are arranged between the twoslot thermal contacts 44. Slot electrical contacts close to therespective slot thermal contacts 44 are used as the power-supply slotelectrical contacts 43 a via which signals need not be transmitted athigh speed. The power-supply slot electrical contacts 43 a are used forthe power supply 24 and the power supply IC 27, described with referenceto FIG. 2B. As described above, since the slot base 42 is formed of LCPwhich is low in thermal conductivity, the slot thermal contact 44 andthe power-supply slot electrical contact 43 a are thermally insulatedfrom each other.

Ones of the slot electrical contacts 43 arranged laterally inward of thepower-supply slot electrical contacts 43 a, which are away from the slotthermal contacts 44, are the communication slot electrical contacts 43b. That is, high-speed signal lines are arranged at respective locationswhere they are less liable to be affected by heat. In general, twistedpair lines of the same impedance are used for high-speed signaltransmission, and it is convenient for signal transmission to arrangehigh-speed signal lines at locations less affected by heat. Thecommunication slot electrical contacts 43 b are used for connectionbetween the host controller 25 and the controller 28, appearing in FIG.2B.

FIGS. 4A to 4E are diagrams useful in explaining the configuration ofthe card medium 5 appearing in FIGS. 3A and 3B, in which FIG. 4A is aperspective view of the card medium 5, FIG. 4B is a view of the same ina state having a card label removed therefrom, as viewed from the upperside thereof, FIG. 4C is a view of the inside of the same, as viewedfrom the upper side thereof, FIG. 4D is a view of the card medium 5, asviewed from the lower side thereof, and FIG. 4E is a view of the insideof the card medium 5, as viewed from the lower side thereof.

Referring to FIG. 4A, the card medium 5 has the terminal surface 51, anda rear end surface 52 is defined in an opposed relation to the terminalsurface 51. Further, a left-side surface 55 and a right-side surface 56,as viewed in the inserting direction of the card medium 5, are oppositeto each other, whereby the card medium 5 is defined to have arectangular shape (card-shape). Surfaces of the card medium 5, which arevertically opposite to each other, are referred to as a first surface 53and a second surface 54, with a second-surface card label 57 beingattached to the second surface 54, and the terminal surface 51 isprovided with the card electrical contacts, denoted by reference numeral58, and card thermal contacts (first thermal contacts) 59.

The card medium 5 is inserted into the slot 31, as described withreference to FIGS. 3A and 3B. A direction in which the card medium 5 ismoved when the card medium 5 is inserted or removed is referred to asthe inserting/removing direction. In general, the card medium 5 is notinserted and removed in a thickness direction or an oblique direction,and hence the thickness direction of the card medium 5 and theinserting/removing direction are orthogonal to each other (i.e.intersect with each other). Note that the thickness direction is adirection from the first surface 53 toward the second surface 54.Further, a direction orthogonal to the thickness direction and theinserting/removing direction is referred to as the width direction.

In the illustrated example in FIG. 4A, a direction from the firstsurface 53 toward the second surface 54 in the thickness direction isassumed to be a positive direction. With respect to theinserting/removing direction, a direction in which the card medium 5 isinserted into the slot 31 is assumed to be a positive direction.Further, in the present example, coordinates forming a left-handedsystem are set. Further, the positive direction with respect to theinserting/removing direction is also referred to as the insertingdirection, and a negative direction with respect to the same is alsoreferred to as the removing direction. Further, a main heat source (acontroller 69, referred to hereinafter) is assumed to exist on the sideof the first surface 53, and the opposite surface to the first surface53 is the second surface 54.

For convenience of explanation, here, as to the slot 31, a side thereoftoward the slot substrate 41 is referred to as the lower side, and as tothe card medium 5 as well, a side thereof toward the slot substrate 41in a state in which the card medium 5 is inserted into the slot 31 andis enabled to perform communication is referred to as the lower side. Inthe illustrated example in FIG. 4A, the first surface 53 is the lowersurface of the card medium 5, and the second surface 54 is the uppersurface of the card medium 5. However, the card medium 5 is insertedinto the camera body 1 such that the vertical direction of the cardmedium 5 in FIG. 4A is a horizontal direction of the camera body 1.

As mentioned above, the second surface 54 has the second-surface cardlabel 57 attached thereto. The second-surface card label 57 describesinformation indicative of standards with which the card medium 5 iscompliant, the storage capacity, and communication speed of the cardmedium 5, and so forth. The arrangement of terminals (contacts) on thecard medium 5 corresponds to the arrangement of the terminals (contacts)on the slot, described with reference to FIG. 3B. That is, on the cardmedium 5, the card thermal contacts 59 are arranged at the outermostlocations, and power-supply card electrical contacts 58 a are arrangedinward of the opposite card thermal contacts 59, respectively. Further,communication card electrical contacts 58 b are arranged at theinnermost locations.

As shown in FIG. 4A, the card electrical contacts 58 and the cardthermal contacts 59 are arranged at the same position in the thicknessdirection. That is, assuming that the card electrical contacts 58 andthe card thermal contacts 59 are made different in position in thethickness direction, this increases the thickness of the card medium 5,and hence they are arranged such that they are disposed at the sameposition in the thickness direction.

FIG. 4B shows the card medium 5 in the state having the second-surfacecard label 57 removed therefrom, as viewed from the upper side thereof.Further, FIG. 4C shows the card medium 5 in a state in which asecond-surface card exterior, referred to hereinafter, is removedtherefrom, as viewed from the upper side thereof. Further, FIG. 4D showsthe card medium 5, as viewed from the lower side thereof. Furthermore,FIG. 4E shows the card medium 5 in a state in which a first-surface cardlabel and a first-surface card exterior, referred to hereinafter, areremoved, as viewed from the lower side thereof. Note that in FIGS. 4B to4E, the card medium 5 is illustrated such that the terminal surface 51is on the upper side.

Referring to FIGS. 4B to 4E, the card medium 5 includes a card framebody 62 having a substantially U-shape, and is provided with a cardconnector 61. Further, the card medium 5 includes the second-surfacecard exterior, denoted by reference numeral 63, and the second-surfacecard exterior 63 is formed with a hole 63 a. A card substrate 64 ismounted in the card medium 5, and in the illustrated example, an areafor mounting flash memories 65 a to 65 d is arranged on the cardsubstrate 64. Further, areas 66 a and 66 b for mounting components otherthan the flash memories 65 a to 65 d and the card controller(hereinafter simply referred to as the controller) 69 are arranged onthe card substrate 64. Further, the card medium 5 includes thefirst-surface card exterior, denoted by reference numeral 67, and thefirst-surface card label, denoted by reference numeral 68.

In the card medium 5, the card substrate 64 and the card connector 61are connected by soldering, and the card frame body 62 and the cardconnector 61 are assembled to each other. Further, the first-surfacecard exterior 67 and the second-surface card exterior 63 are fitted infrom the upper and lower sides, respectively, and are assembled bysnap-fitting (so-called click clamping). Thus, the outer shape of thecard medium 5 is completed to form a card casing. That is, the cardcasing includes the card connector 61, the card frame body 62, thesecond-surface card exterior 63, and the first-surface card exterior 67.

In this state, a potting material is injected from the hole 63 a. Then,the first-surface card label 68 and the second-surface card label 57 areattached and heated, whereby the card medium 5 is completed. The pottingmaterial is cured by heating to thereby promote heat conduction on thecard medium 5. Further, the sturdiness and weatherability of the cardmedium 5 are improved.

Note that components other than the above-mentioned components are fixedto the card connector 61 or the card substrate 64 by press-fitting orsoldering. Further, in FIGS. 4A to 4E, illustration of the pottingmaterial makes the structure of the card medium 5 unclear, and hence thepotting material is omitted from illustration.

The card connector 61 is molded of LCP so as to make the same resistantto heat, and thin and compact, similarly to the slot base 42. Further,each card electrical contact 58 is not formed to have a spring property,and is formed by plating (such as gold plating) pure copper or copperalloy, by considering solder wettability, contact electric resistance,and so forth.

Each card thermal contact 59 is formed by plating (such as hard chromeplating) pure copper or copper alloy, by considering thermalconductivity, slidability, wear resistance, and so forth. The surfacehardness can be largely improved by the plating-coated portion withoutaffecting thermal resistance, similarly to the slot thermal contact.That is, it is possible to form the card thermal contact 59 having highreliability, which is less prone to scratching when the card medium 5 isinserted and removed. The card thermal contacts 59 are provided in pairin a manner spaced from each other with a predetermined distance in thewidth direction in which the electrical contacts are arranged. Asdescribed above, by providing the card thermal contacts 59 in pair, itis possible to prevent tilt of the whole card medium 5, and therebyensure stable contact of the card thermal contacts 59. As shown in FIG.4A, a surface of each card thermal contact 59 is a surface which isbrought into contact with an associated one of the slot thermal contacts44 provided on the slot 31. The contact surface is thus provided in adirection orthogonal to the thickness direction of the card medium 5.

The card connector 61 is formed with a hole 80, in which the cardelectrical contacts 58 and the card thermal contacts 59 are press-fittedand held.

The card substrate 64 has the flash memories 65 a to 65 d and thecontroller 69 arranged thereon. Further, although not shown in detail,the power supply IC 27, a capacitor, and so forth, are mounted in theareas 66 a and 66 b. The controller 69 is the highest in powerconsumption in the card medium 5, and is the main heat source. The flashmemories 65 a to 65 d are other heat sources.

The card substrate 64 is formed with a hole 64 a, and the pottingmaterial can flow from the second surface toward the first surface. Thecard substrate 64 is formed with an area for mounting the card connector61 thereon, and the card substrate 64 and the card connector 61 arepositioned and fixed to each other by soldering. The first-surface cardlabel 68 is attached to the first surface as the lower surface of thecard medium 5, and is used by a user as a note space or the like.

FIGS. 5A to 5D are diagrams useful in explaining the arrangement of thecomponents in the thickness direction of the card medium shown in FIGS.4A to 4E, in which FIG. 5A shows the card medium, as viewed from theupper side thereof, and FIGS. 5B, 5C, and 5D are cross-sectional viewsof the card medium taken along B-B, C-C, and D-D in FIG. 5A,respectively.

Referring to FIG. 5A, the eject mechanism 47 is provided on the slotcover 45, and includes the eject button 46, an eject arm 47 ainterlocked with the eject button 46, an rotary arm 47 c which isrotated about a rotation center 47 b, and an eject plate, portions ofwhich are shown. The illustrated portions of the eject plate are a lug47 d appearing in FIG. 5A and legs 47 e provided at opposite endsthereof in the width direction orthogonal to the inserting/removingdirection (one of the legs 47 e appears in FIG. 5D).

FIG. 5B shows a cross section at a position including one of the slotelectrical contacts 43 and the controller 69 as the main heat source.The controller 69 is mounted on a side of the card substrate 64, towardthe slot substrate 41. The controller 69 is connected to thefirst-surface card exterior 67 via the potting material, denoted byreference numeral 70. The flash memories 65 a and 65 d as the other heatsources are mounted on the opposite sides of the card substrate 64,respectively. The flash memories 65 a and 65 d are connected to thesecond-surface card exterior 63 and the first-surface card exterior 67,respectively, via the potting material 70, similarly to the controller69.

By filling spaces between the heat sources and the exteriors with thepotting material as described above, it is possible to reduce thermalresistance, compared with a case where the spaces are left as air gaps.This makes it possible to more efficiently guide heat from the heatsources to the first-surface card exterior 67 and the second-surfacecard exterior 63 of the card medium 5.

As mentioned hereinabove, the slot electrical contacts 43 each have aspring property, and are brought into contact with the card electricalcontacts 58 while pressing the card electrical contacts 58 from theupper side to the lower side as viewed in FIG. 5B. The position of thecard electrical contacts 58 in the thickness direction is determined bythe contact between the slot thermal contacts 44 and the card thermalcontacts 59. By properly setting this position, the contact between theslot electrical contacts 43 and the card electrical contacts 58 becomesa desired one. For example, the position of the card electrical contacts58 for performing electrical communication is set to a position higherthan a lower end position of the slot electrical contacts 43 in a statein which the card medium 5 is not inserted, and lower than a positionwhich corresponds to a limit of elasticity of the slot electricalcontacts 43. By setting the position as above, the contact between theslot electrical contacts 43 and the card electrical contacts 58 becomesa desired state.

When focusing on the inserting/removing direction, the card abutmentsurface 42 d of the slot base 42 and the terminal surface 51 of the cardmedium 5 are in contact with each other. In this position, the cardelectrical contacts 58 and the slot electrical contacts 43 are in amatching position with respect to the inserting/removing direction. Morespecifically, the card electrical contacts 58 extend in theinserting/removing direction, and the slot electrical contacts 43 can bebrought into contact with the card electrical contacts 58 at a certainposition in which the card electrical contacts 58 extend.

FIG. 5C shows a cross section at a position including one of the slotthermal contacts 44. The flash memories 65 b and 65 c as the other heatsources are mounted on the opposite surfaces of the card substrate 64,respectively. The flash memories 65 b and 65 c are connected to thefirst-surface card exterior 67 and the second-surface card exterior 63via the potting material 70, respectively, similarly to the controller69 appearing in FIG. 5B. Also in this state, by filling the spacesbetween the heat sources and the exteriors with the potting material 70,it is possible to reduce thermal resistance, compared with a case wherethe spaces are left as air gaps. This makes it possible to moreefficiently guide heat from the heat sources to the first-surface cardexterior 67 and the second-surface card exterior 63 of the card medium5.

Each slot thermal contact 44 is formed of copper alloy having no springproperty, and is brought into surface contact with an associated one ofthe card thermal contacts 59 by a card pressing spring 90, referred tohereinafter. Heat from the controller 69 and the like as the heatsources of the card medium 5 is sequentially transferred via the cardsubstrate 64 in the following transfer path of the card thermal contacts59, the slot thermal contacts 44, and the slot substrate 41. Then, theheat is exhausted from the slot substrate 41 to the outside via the heattransfer section 15 appearing in FIG. 1.

In the above-described heat exhaust path, thermal resistance of eachpart is small. More specifically, the controller 69 and the cardsubstrate 64, the card substrate 64 and the card thermal contacts 59,and the slot thermal contacts 44 and the slot substrate 41 are solderedto each other, respectively, and hence the thermal resistance is small.The card substrate 64 and the slot substrate 41 are each formed by amulti-layer substrate, and are patterned such that a large amount ofcopper remains e.g. by arranging the power supply and the ground(so-called solid ground pattern) in an intermediate layer, and hence thethermal resistance is small. Each slot thermal contact 44 and each cardthermal contact 59 are formed of copper alloy, and hence the thermalresistance is small. Further, the slot thermal contacts 44 and the cardthermal contacts 59 are brought into surface contact with each other tothereby reduce thermal resistance generated by the contact. Therefore,the thermal resistance is small in this connection as well. Thus, it ispossible to sufficiently reduce the thermal resistance of each part, andhence it is possible to efficiently exhaust heat to the outside throughthe above-mentioned heat exhaust path.

FIG. 5D shows a cross section at a position including the ejectmechanism 47. Here, a description will be given of the operation of theeject mechanism 47 with reference to FIGS. 5A and 5D.

The rotary arm 47 c is arranged to be rotatable about the rotationcenter 47 b fitted on a protrusion, not shown, formed on the slot cover45. The rotary arm 47 c is rotatably engaged with the lug 47 d. Theeject arm 47 a connected to the rotary arm 47 c is guided by a guidingprotrusion provided on the slot cover 45, and is held in a mannerslidable only in a left-right direction as viewed in FIG. 5A(inserting/removing direction of the card medium 5). Further, the ejectbutton 46 is disposed at an extremity of the eject arm 47 a via a linkportion 46 a. Further, the eject plate including the lug 47 d and thelegs 47 e is held by guide portions, not shown, provided on the slotcover 45 in a manner slidable only in the left-right direction in FIG.5A, similarly to the eject arm 47 a.

With the above arrangement, when the eject arm 47 a is moved to theleft, the eject plate including the lug 47 d is moved in an oppositedirection, i.e. to the right.

As described hereinabove with reference to FIG. 3A, when the card medium5 is inserted into the slot 31, the eject button 46 is protruded. Atthis time, as shown in FIG. 5D, the card medium 5 is inserted whilepushing in the legs 47 e (hence the eject plate which includes the legs47 e and the lug 47 d rotatably engaged with the rotary arm 47 c). As aresult, in FIG. 5A, the lug 47 d (included in the eject plate) is movedto the left, and the rotary arm 47 c is rotated about the rotationcenter 47 b in a clockwise direction, whereby the eject arm 47 a ismoved to the right. This causes the eject button 46 to protrude.

When removing the card medium 5, the eject button 46 is pressed in. As aresult, in FIG. 5A, the eject arm 47 a is moved to the left, and therotary arm 47 c is rotated in an anticlockwise direction, whereby thelug 47 d is moved to the right. This causes the eject plate includingthe lug 47 d to push the card medium 5 out of the slot 31.

FIGS. 6A to 6D are diagrams useful in explaining the inserted andremoved states of the card medium, shown in FIGS. 4A to 4E, and eachshowing a state in which the position of the card medium in theinserting/removing direction is changed.

As shown in FIG. 6D, the left-side surface 55 and the right-side surface56 of the card medium 5 are formed with a right side surface recess 55 band a left side surface recess 56 b, respectively. FIG. 6A shows a statein which the slot base 42 and the card medium 5 are not in contact. Inthis state, the card medium 5 is being guided with a large gap from theslot cover (not appearing in FIGS. 6A to 6D). This state is hereinafterreferred to as the insertion preparation state.

FIG. 6B shows a state in which the slot base 42 and the card medium 5have started to be brought into contact with each other. In this case,the card-left-side guide portion 55 a and the slot-left-side guideportion 42 b are brought into contact with each other. Also, thecard-right-side guide portion 56 a and the slot-right-side guide portion42 c are brought into contact with each other. As a result, the cardmedium 5 is guided. This state is hereinafter referred to as the firstinsertion state. The first insertion state corresponds to a range inwhich the card medium 5 is not moved in the thickness direction when thecard medium 5 is moved in the inserting direction from the positionwhere the contact between the card medium 5 and the slot base 42 isstarted.

FIG. 6C shows the position of the card medium 5 which is furtherinserted with respect to the slot base 42 before reaching a thirdinsertion state. This state is referred to as the second insertionstate. The second insertion state corresponds to a range from a positionwhere the card medium 5 starts to be moved in the thickness direction toa position of the card medium 5 immediately before reaching the thirdinsertion state.

FIG. 6D shows a state in which insertion of the card medium 5 withrespect to the slot base 42 is completed, and the terminal surface 51and the card abutment surface 42 d are brought into contact with eachother. In this state, the card medium 5 is enabled to perform electricalcommunication and the like. This state is referred to as the thirdinsertion state. In the third insertion state, spring portions, notshown, provided on the slot cover 45 are brought into contact with theright side surface recess 55 b and the left side surface recess 56 b.This prevents the card medium 5 from being removed, and a pressing forceis applied in a direction in which the terminal surface 51 and the cardabutment surface 42 d are brought into contact with each other.

FIGS. 7A and 7B are diagrams useful in explaining details of the cardmedium 5 and the slot 31 according to the first embodiment, in whichFIG. 7A shows the card medium 5 together with an enlarged part thereof,and FIG. 7B shows the slot 31 together with an enlarged part thereof.

Referring to FIG. 7A, the card-left-side guide portion 55 a of theleft-side surface 55 of the card connector 61 is formed with a firstcard upper guide surface 81 and a second card upper guide surface 82.Note that an escape portion 83 is part of the left-side surface 55 ofthe card medium 5, which is not formed with the card-left-side guideportion 55 a.

The card-left-side guide portion 55 a is formed to have a predeterminedlength over which it extends from the terminal surface 51 in the cardinserting/removing direction. The first card upper guide surface 81 andthe second card upper guide surface 82, formed on the card-left-sideguide portion 55 a, are brought into contact with the slot-left-sideguide portion 42 b by the card pressing spring 90, described hereinafterwith reference to FIG. 7B.

Note that detailed description will be given hereinafter of thecontact/separation states of the first card upper guide surface 81, thesecond card upper guide surface 82, and the escape portion 83 in thefirst insertion state, the second insertion state, and the thirdinsertion state, with reference to FIGS. 6B to 6D.

The first card upper guide surface (first height restriction portion) 81is a flat surface which extends orthogonal to the thickness directionand is brought into contact with the slot 31 when the card medium 5 ispressed in the thickness direction. The escape portion (second heightrestriction portion) 83 is an escape portion on the side surface of thecard medium 5 with respect to the engagement portion on the slot 31. Theescape portion 83 is only required to be different in height in thethickness direction from the first card upper guide surface 81. That is,the escape portion 83 may be formed on a portion protruding from theside surface of the card medium 5 differently from the card-left-sideguide portion 55 a.

The second card upper guide surface (third height restriction portion)82 is formed on a surface smoothly connecting (i.e. linking) between thefirst card upper guide surface (first height restriction portion) 81 andthe escape portion (second height restriction portion) 83. Note that theterm “smooth connection” is intended to mean connection between thefirst height restriction portion and the second height restrictionportion by the third height restriction portion formed such that theposition of the third height restriction portion in the thicknessdirection undergoes gradual change. For example, the first card upperguide surface 81 and the escape portion 83 may be connected by forming achamfered surface or a tapered surface. This makes it possible tosmoothly perform the removal operation as described hereinafter.

As is clear from FIG. 7A or 4A, the first card upper guide surface 81 isformed to have a length extending from the terminal surface 51 in thecard inserting/removing direction, which corresponds to a little over10% of the length of the card medium 5. The length of the first cardupper guide surface 81 in the card inserting/removing direction is onlyrequired to be a predetermined length not larger than half the length ofthe card medium 5 in the same direction.

By forming the first card upper guide surface 81 from the terminalsurface 51, it is possible to smoothly shift the insertion state fromthe insertion preparation state, shown in FIG. 6A, to the firstinsertion state. Further, the first card upper guide surface 81 isformed to have a predetermined length in the card inserting/removingdirection, and hence this not only enables the user to easily insert andremove the card medium 5, but also makes it unnecessary to increase thesize of a guide part on the slot more than necessary, i.e. this makes itpossible to reduce the size of the slot, and smoothly insert and removethe card medium 5.

Referring to FIG. 7B, the slot 31 is provided with the card pressingspring (urging portion) 90, and the slot-left-side guide portion 42 b isformed with a first slot upper guide surface 91, a second slot upperguide surface 92, and a third slot upper guide surface 93.

FIGS. 8A to 8D are diagrams useful in explaining the contact andseparation states of the card medium 5 and the slot 31, shown in FIGS.7A and 7B, in which FIG. 8A shows the contact/separation states of thefirst slot upper guide surface 91, the second slot upper guide surface92, and the third slot upper guide surface 93, in the first insertionstate described with reference to FIG. 6B. FIG. 8B shows thecontact/separation states of the first slot upper guide surface 91, thesecond slot upper guide surface 92, and the third slot upper guidesurface 93, in the second insertion state described with reference toFIG. 6C. FIG. 8C shows the contact/separation states of the first slotupper guide surface 91, the second slot upper guide surface 92, and thethird slot upper guide surface 93, in the third insertion statedescribed with reference to FIG. 6D. FIG. 8D shows a state in which thecard thermal contacts and the slot thermal contacts are completelybrought into contact with each other. Note that FIGS. 8A to 8D eachschematically show the respective cross sections of the guide partformed by the first to third slot upper guide surfaces 91, 92, and 93 ofthe slot 31, a thermal terminal part including the card thermal contact59, and an electrical terminal part including the card electricalcontact 58.

The first slot upper guide surface (first guide surface) 91 is a flatsurface which extends orthogonal to the thickness direction of the cardmedium 5 and restricts the position of the card medium 5 in thethickness direction. The third slot upper guide surface (second guidesurface) 93 is a surface which restricts the position of the card medium5 in the thickness direction to a position different from a position inthe thickness direction to which the position of the card medium 5 isrestricted by the first slot upper guide surface 91. The second slotupper guide surface (third guide surface) 92 is a surface smoothlyconnecting between the first slot upper guide surface 91 and the thirdslot upper guide surface 93. For example, the second slot upper guidesurface (third guide surface) 92 is a chamfered surface or a taperedsurface which connects between the first slot upper guide surface 91 andthe third slot upper guide surface 93.

Each card pressing spring 90 presses (urges) the card medium 5 in thepositive direction with respect to the thickness direction when the cardmedium 5 is inserted into the slot 31. The position of the card pressingsprings 90 in the inserting/removing direction is determined such thatits pressing force in the thickness direction is generated after thecard-left-side guide portion 55 a and the slot-left-side guide portion42 b are brought into contact with each other. Note that the cardpressing springs 90 and the guide surfaces may be symmetrically arrangedon the slot 31.

Reference numeral 95 indicates a gap formed between the slot thermalcontacts 44 and the card thermal contacts 59 in the thickness directionin the first insertion state. Reference numeral 96 indicates a gapformed between the slot connector 42 a and the card electrical contacts58 in the thickness direction in the first insertion state. Referencenumeral 97 indicates a gap formed between lower ends of the slotelectrical contacts 43 and the slot connector 42 a in a natural state(state in which the spring is not pressed). Reference numeral 98indicates a gap formed between the slot thermal contacts 44 and the cardthermal contacts 59 in the thickness direction in the second insertionstate. Reference numeral 99 indicates a gap formed between the cardelectrical contacts 58 and the lower ends of the slot electricalcontacts 43 in the thickness direction in a state in which the slotthermal contacts 44 and the card thermal contacts 59 are in contact inthe thickness direction.

Referring to FIG. 8A, the card medium 5 is pressed upward by the cardpressing springs 90 from below (in the positive direction with respectto the thickness direction). The first card upper guide surface 81 ofthe card-left-side guide portion 55 a and the first slot upper guidesurface 91 of the slot-left-side guide portion 42 b are brought intocontact with each other by the pressing force. At this time, the cardthermal contacts 59 and the slot thermal contacts 44 are spaced fromeach other with the gap 95 therebetween in the thickness direction.Similarly, the card electrical contacts 58 and the slot connector 42 aare spaced from each other with the gap 96 therebetween in the thicknessdirection.

These gaps make it possible to insert the card medium 5 withoutinterference when the card medium 5 is moved in the insertion direction.Further, the gap 97 is formed between the lower ends of the slotelectrical contacts 43 and the slot connector 42 a in the natural state,and from this state, when the card electrical contacts 58 spaced fromthe slot connector 42 a in the thickness direction by the gap 96 isinserted, the slot electrical contacts 43 are brought into contact withthe card electrical contacts 58 while being elastically deformed,whereby it is possible to perform stable communication.

Referring to FIG. 8B, the card medium 5 is pressed upward by the cardpressing springs 90 from below (in the positive direction with respectto the thickness direction). The second card upper guide surface 82 ofthe card-left-side guide portion 55 a and the second slot upper guidesurface 92 of the slot-left-side guide portion 42 b are brought intocontact with each other by the pressing force. The second card upperguide surface 82 and the second slot upper guide surface 92 are formedas the tapered surfaces such that as the card medium 5 is inserted, thecard medium 5 is moved upward along the tapered surfaces from below. Atthis time, the card thermal contacts 59 and the slot thermal contacts 44are spaced from each other with the gap 98 therebetween in the thicknessdirection. Further, since the card medium 5 is gradually moved upwardfrom below, the gap 98 is smaller than the gap 95.

Next, referring to FIG. 8C, the card medium 5 is pressed upward by thecard pressing springs 90 from below (in the positive direction withrespect to the thickness direction). On the other hand, the slotelectrical contacts 43 are brought into contact with the card electricalcontacts 58, and press the card medium 5 downward from above (in thenegative direction with respect to the thickness direction). By makingthe spring force (urging force) of the card pressing springs 90 largerthan a resultant force of the spring forces of the slot electricalcontacts 43, the card medium 5 is pressed upward from below (positivedirection with respect to the thickness direction). When focusing on thethermal contacts, the card thermal contacts 59 and the slot thermalcontacts 44 are brought into contact with each other. Further, thesecond card upper guide surface 82 of the card-left-side guide portion55 a and the second slot upper guide surface 92 of the slot-left-sideguide portion 42 b are brought into contact with each other.

When the card medium 5 is further moved in the inserting direction fromthis state, height restriction comes to be performed not by thecard-left-side guide portion 55 a, but by the position of contactbetween the card thermal contacts 59 and the slot thermal contacts 44.That is, even when the card medium 5 is further inserted in theinserting direction, the card medium 5 is not moved in the thicknessdirection, and the card-left-side guide portion 55 a is separated fromthe slot-left-side guide portion 42 b. Note that the gap 99 is smallerthan the gap 97 between the lower ends of the slot electrical contacts43 and the slot connector 42 a in the natural state, shown in FIG. 8A.That is, the card electrical contacts 58 are in respective positionswhere stable communication can be performed.

Referring to FIG. 8D, the card medium 5 is pressed upward by the cardpressing springs 90 from below (in the positive direction with respectto the thickness direction). The card thermal contacts 59 and the slotthermal contacts 44 are brought into contact with each other by thepressing force. The card-left-side guide portion 55 a is in a positionopposed to the third slot upper guide surface 93. When the card thermalcontacts 59 and the slot thermal contacts 44 are brought into contactwith each other in the thickness direction, the third slot upper guidesurface 93 and the card-left-side guide portion 55 a are separated fromeach other in the thickness direction. As a result, the card thermalcontacts 59 and the slot thermal contacts 44 are stably brought intocontact with each other avoiding double fitting.

In the structure shown in FIGS. 7A and 7B, and 8A to 8D, the cardpressing springs 90 press the card medium 5 in an opposite direction tothe pressing direction of the spring force of the slot electricalcontacts 43. In other words, the card pressing springs 90 press the cardmedium 5 in a direction in which the card electrical contacts 58 and theslot electrical contacts 43 are brought closer to each other. Further,the card pressing springs 90 are stronger in pressing force than thespring force of the slot electrical contacts 43, and hence the cardelectrical contacts 58 and the slot electrical contacts 43 are stablybrought into contact with each other in the third insertion state. As aresult, it is possible to perform stable communication.

To reduce thermal resistance, it is necessary to bring the card thermalcontacts 59 and the slot thermal contacts 44 into firm contact with eachother on a large area. The term “firm contact” is intended to mean“bringing the contacts into contact with each other with reduced airlayer” to thereby reduce thermal resistance. In the structure shown inFIGS. 7A and 7B, and 8A to 8D, the card medium 5 is pressed by the cardpressing springs 90, and the contact surface where the card medium 5 andeach card pressing spring 90 are in contact forms a flat surfaceorthogonal to the pressing direction of the card pressing springs 90.This makes it possible to bring the card thermal contacts 59 and theslot thermal contacts 44 into firm contact with each other. Further, thecontact surface forms a flat surface orthogonal to the thicknessdirection of the card medium 5.

Since the dimension of the card medium 5 in the thickness direction islimited as mentioned above, if the contact surface between the thermalcontacts is set such that it includes the thickness, it is difficult toincrease the contact area. On the other hand, if the contact surfacebetween the thermal contacts is set in a direction along a planeorthogonal to the thickness direction of the card medium 5, it is easyto increase the contact area. Note that the size of the contact areabetween the thermal contacts is determined by taking into account theamount of heat generated in the card medium 5 and so forth.

As described above, the card medium 5 is pressed by the card pressingsprings 90 in the positive direction with respect to the thicknessdirection in the third insertion state. The card pressing springs 90 areprovided as a right and left pair, as shown in FIG. 7B, and theresultant force of the card pressing springs 90 is applied in thepositive direction with respect to the thickness direction insubstantially the center with respect to the width direction of the slotbase. On the other hand, as is clear from FIGS. 3B and 4A, the slotthermal contacts 44 and the card thermal contact 59 are provided asrespective right and left pairs in the width direction. That is, theplurality of thermal contacts are provided such that the resultant forceof the card pressing springs 90 is positioned inward of the thermalcontacts in the width direction. This makes it possible to bring thethermal contacts into surface contact with each other without tilting,whereby it is possible to reduce thermal resistance and promote heatdissipation.

Here, a simple description will be given of removal of the card medium5. As described hereinabove, the slot 31 includes the eject mechanism47, and when the eject button 46 is pressed, the card medium 5 isdischarged from the slot 31. At this time, the card medium 5 in thestate shown in FIG. 8D is discharged by transitioning through the statesshown in FIGS. 8C, 8B, and 8A in the mentioned order.

When removing the card medium 5, the second card upper guide surface 82smoothly connects between the first card upper guide surface 81 and theescape portion 83. Further, the second slot upper guide surface 92smoothly connects between the second slot upper guide surface 92 and thethird slot upper guide surface 93. This makes it possible to smoothlyremove the card medium 5 without collision of edges with each other inthe third insertion state.

As described above, in the first embodiment of the present invention, itis possible to prevent lowering of the reliability due to repeatedinsertion and removal of the card medium, and thereby improve thermaland electrical connection.

Next, a description will be given of a card medium and a slot accordingto a second embodiment of the present invention. In the secondembodiment, the terminals on the slot side are directly brought intocontact with a copper foil (land) on the card substrate.

FIGS. 9A and 9B are diagrams useful in explaining the card medium andthe slot according to the second embodiment of the present invention, inwhich FIG. 9A is a perspective view showing the slot in an explodedmanner, and FIG. 9B is a perspective view showing part of the slot in anenlarged manner. The same components in FIGS. 9A and 9B as those in FIG.3B are denoted by the same reference numerals.

As shown in FIG. 9A, slot spring portions 45 b are provided on the slotcover 45. In FIG. 9A, the eject mechanism provided on the slot 31 has astructure different from that of the eject mechanism described in thefirst embodiment, and is a so-called push-lock/push-eject mechanism.This eject mechanism is arranged at a location along the right sidesurface.

The slot cover 45 is mounted on the slot base 42 by snap-fitting. Theslot spring portions 45 b provided on the slot cover 45 weakly press thecard medium 5 so as to stabilize the posture of the card medium 5 in theinsertion preparation state. The slot spring portions 45 b press thecard medium 5 in the negative direction with respect to the thicknessdirection.

Similar to the first embodiment, the slot thermal contacts 44 areprovided on the opposite ends of the slot 31, respectively, and the cardpressing springs 90 are also provided in pair. The card pressing springs90 press the card medium 5 in the first insertion state, the secondinsertion state, and the third insertion state, in the similar manner tothe first embodiment. The card pressing springs 90 press the card medium5 in the positive direction with respect to the thickness direction. Thecard pressing springs 90 press the card medium 5 with a larger forcethan the above-mentioned slot spring portion 45 b. The slot electricalcontacts 43 are arranged so as to press the card medium 5 toward theslot substrate 41. The card pressing springs 90 press the card medium 5in a direction opposite to the direction in which the slot electricalcontacts 43 press the card medium 5.

FIGS. 10A to 10E are diagrams useful in explaining the configuration ofthe card medium appearing in FIGS. 9A and 9B, in which FIG. 10A is aperspective view of the card medium 5, showing together with a diagramshowing part of the card medium 5 in an enlarged manner, FIG. 10B showsthe card medium 5 in a state in which the card label is removed, asviewed from the upper side thereof, FIG. 10C shows the inside of thecard medium 5, as viewed from the upper side thereof, FIG. 10D shows thecard medium 5, as viewed from the lower side thereof, and FIG. 10E showsthe inside of the card medium 5, as viewed from the lower side thereof.The same components in FIGS. 10A to 10E as those in FIGS. 4A to 4E aredenoted by the same reference numerals.

As shown in FIG. 10A in the enlarged manner, the terminal surface 51 isformed with a thermal contact escape surface 101. Further, as shown inFIGS. 10C and 10E, the card substrate 64 is formed with on-boardcontacts 102 a and 102 b.

The illustrated card medium 5 has the card electrical contacts 58 andthe card thermal contacts 59 formed by lands on the card substrate 64.Further, the controller 69 as the main heat source is located on apositive side of the card substrate 64 in the thickness direction, andthe first surface and the second surface are inverted from those of theexample shown in FIGS. 4A to 4E. That is, in FIG. 10A, an upper surfaceis the first surface, and a surface opposed to the slot substrate 41 isthe second surface (the first-surface card label 68 is on the upper sidein FIG. 10A).

In the second embodiment, although the arrangement of the heat sourceson the card medium 5 is different from that in the first embodiment,heat is transferred in the same manner as described in the firstembodiment. More specifically, heat from the controller 69 and the likeas the representative heat sources of the card medium 5 is transferredvia the card substrate 64 in the following transfer path of the cardthermal contacts 59, the slot thermal contacts 44, and the slotsubstrate 41. There is no essential difference between the thermalresistance between the controller 69 and the card substrate 64, and thethermal resistance described with reference to FIGS. 5A to 5D.

In the second embodiment, the advantageous effects thereof do not dependon the arrangement of the heat sources on the card medium 5. On theother hand, on the heat dissipation path via the exterior, thearrangement of the heat sources affects the effect. In the secondembodiment, the arrangement of the heat sources can be freely set, andhence a degree of freedom in designing is high. Further, the secondembodiment differs from the first embodiment in the structure of thecard casing.

In the second embodiment, the card frame body 62 is divided into two,and has a first surface card frame body 62 a and a second surface cardframe body 62 b. In the first surface card frame body 62 a, thefirst-surface card exterior 67 is insert-molded. Further, in the secondsurface card frame body 62 b, the second-surface card exterior 63 isinsert-molded. The card substrate 64 is sandwiched between the firstsurface card frame body 62 a and the second surface card frame body 62 bto thereby form the card casing. More specifically, the card substrate64 is roughly positioned to the second surface card frame body 62 b e.g.using a cutout. Then, the first surface card frame body 62 a and thesecond surface card frame body 62 b are positioned using positioningportions (such as a protrusion and a hole, not shown, formed on/in thefirst surface card frame body 62 a and the second surface card framebody 62 b). After that, the peripheral portions of the first surfacecard frame body 62 a and the second surface card frame body 62 b arebonded or welded to each other to thereby form the card casing.

As described above, in the second embodiment, the controller 69 ismounted on a different surface from that in the first embodiment.Further, one of the flash memories 65 a to 65 d as the other heatsources is mounted on the same surface on which the controller 69 ismounted, and the remaining three of them are mounted on a differentsurface from the surface on which the controller 69 is mounted. Further,the on-board contacts 102 a and 102 b are mounted on the card substrate64.

When the card casing is formed, the on-board contacts 102 a and 102 bare elastically deformed and are brought into contact with thefirst-surface card exterior 67 and the second-surface card exterior 63,respectively. The contact areas are not large, and hence do not providesufficient thermal connection (thermal resistance is high), but providesufficient electrical connection. The electrical connection makes itpossible to obtain the advantageous effects of electromagnetic waveshield and the like.

FIGS. 11A and 11B are diagrams useful in explaining details of the cardmedium 5 and the slot 31 according to the second embodiment. FIG. 11Ashows the card medium 5 and part thereof in an enlarged manner, and FIG.11B shows the slot 31 and part thereof in an enlarged manner. The samecomponents in FIGS. 11A and 11B as those in FIGS. 7A and 7B are denotedby the same reference numerals.

In the illustrated example in FIGS. 11A and 11B, the third slot upperguide surface 93 is not formed on the slot base 42, and the slot cover45 forms the third slot upper guide surface 93. Further, the escapeportion 83 is not brought into contact with the guide surface, but isformed at a so-called escape position upward of the card-left-side guideportion 55 a of the side surface of the card medium 5, with the sameheight in the width direction. Also in the second embodiment, the slotspring portions 45 b provided on the slot cover 45 are brought intocontact with the right side surface recess 55 b and the left sidesurface recess 56 b (see FIG. 10E), whereby the card medium 5 is pressedin the inserting direction. To stabilize contact of the slot springportions 45 b, the escape portion 83 is formed not as a portion which isnot formed with the card-left-side guide portion 55 a, but as a recesswhich gives a clearance in the thickness direction.

FIGS. 12A to 12D are diagrams useful in explaining the arrangement ofthe components in the thickness direction of the card medium shown inFIGS. 10A to 10E. FIG. 12A shows the card medium, as viewed from theupper side thereof, and FIGS. 12B, 12C, and 12D are cross-sectionalviews of the card medium taken along B-B, C-C, and D-D in FIG. 12A,respectively.

FIGS. 12A to 12D each show the third insertion state described in thefirst embodiment. FIG. 12B shows a cross section of the thermal terminalpart including the thermal contact 59, and FIG. 12C shows a crosssection of the electrical terminal part including the electrical contact58. Further, FIG. 12D shows a cross section of the guide part formed bythe first to third slot upper guide surfaces 91, 92, and 93.

As is clear from FIG. 12B, the slot thermal contacts 44 and the cardthermal contacts 59 are brought into surface contact with each other ona flat plane orthogonal to the thickness direction. Further, the cardmedium 5 is pressed upward by the card pressing springs 90 from below.This causes the slot thermal contacts 44 and the card thermal contacts59 to be brought into stable contact with each other. Further, as isclear from FIG. 12C, the slot electrical contacts 43 are elasticallydeformed to be brought into contact with the card electrical contacts58.

In FIG. 12D, the slot-left-side guide portion 42 b is separated from thecard medium 5 in the third insertion state. The third card upper guidesurface 83 is formed to recess downward from the first card upper guidesurface 81. Further, in the third insertion state in which the slotthermal contacts 44 and the card thermal contacts 59 are brought intocontact with each other, the first card upper guide surface 81 isseparated from the first slot upper guide surface 91 in the thicknessdirection.

On the other hand, the first card upper guide surface 81 overlaps thefirst slot upper guide surface 91 in the thickness direction, and isbrought into contact with the first slot upper guide surface 91 whenremoving the card medium 5. The first card upper guide surface 81 andthe third card upper guide surface 83 are connected by the second cardupper guide surface 82 which is a smooth surface. This makes it possibleto smoothly remove the card medium 5. As described hereinabove, thethird slot upper guide surface 93 is formed by the slot cover 45.

As described above, the structure described with reference to FIGS. 12Ato 12D makes it possible to withstand repeated insertion and removal ofthe card medium 5 while ensuring positive contact for heat transfer.

As described above, in the second embodiment of the present invention aswell, it is possible to prevent lowering of the reliability due torepeated insertion and removal of a card medium, and thereby improvethermal and electrical connection.

While the present invention has been described with reference toexemplary embodiments, it is to be understood that the invention is notlimited to the disclosed exemplary embodiments. The scope of thefollowing claims is to be accorded the broadest interpretation so as toencompass all such modifications and equivalent structures andfunctions.

This application claims the benefit of Japanese Patent Application No.2016-081055 filed Apr. 14, 2016, which is hereby incorporated byreference herein in its entirety.

What is claimed is:
 1. A card-type storage device comprising: a firstthermal contact having a contact surface which intersects with athickness direction of the card-type storage device; a first restrictionportion that restricts a position of the card-type storage device in thethickness direction to a predetermined first position; a secondrestriction portion that restricts the position of the card-type storagedevice in the thickness direction to a predetermined second positionwhich is different from the predetermined first position; and a thirdrestriction portion that links the first restriction portion and thesecond restriction portion, wherein the card-type storage device isinserted into and removed from a slot device, wherein the firstrestriction portion is formed on a different position from both of thesecond restriction portion and the third restriction portion, in a firstdirection of inserting and removing the card-type storage device intoand from the slot device, and wherein a length of the first restrictionportion in the first direction is not larger than half the length of thecard-type storage device in the first direction.
 2. The card-typestorage device according to claim 1, wherein each of the firstrestriction portion and the second restriction portion is a surfaceintersecting with the thickness direction.
 3. The card-type storagedevice according to claim 1, wherein the first restriction portion isformed on a side portion of the card-type storage device such that thefirst restriction portion extends from an end face of the card-typestorage device in the first direction.
 4. The card-type storage deviceaccording to claim 1, wherein the card-type storage device is providedwith a first electrical contact for supplying power to the card-typestorage device, and wherein the first electrical contact and the firstthermal contact are arranged at the same position in the thicknessdirection.
 5. The card-type storage device according to claim 1, whereinthe first direction intersects with the thickness direction, wherein thefirst restriction portion and the third restriction portion extend froma side portion of the card-type storage device to a direction whichintersects with the thickness direction and the first direction, andwherein the second restriction portion is an escape portion formed inthe direction which intersects with the thickness direction and thefirst direction.
 6. The card-type storage device according to claim 1,wherein the card-type storage device is provided with a first electricalcontact for supplying power to the card-type storage device and a secondelectrical contact for communicating with the slot device, and whereinthe first electrical contact is positioned closer to the first thermalcontact than the second electrical contact.
 7. The card-type storagedevice according to claim 1, further comprising a plurality of firstthermal contacts which are provided in a manner spaced from each otherin a direction intersecting with the thickness direction of thecard-type storage device and the first direction.
 8. The card-typestorage device according to claim 7, wherein the plurality of firstthermal contacts are each formed of pure copper or copper alloy, andwherein a surface of each of the plurality of first thermal contacts iscovered with a material having lower thermal conductivity and higherhardness than the pure copper or the copper alloy.
 9. A slot device intowhich and from which a card-type storage device is inserted and removed,wherein the card-type storage device includes a first thermal contacthaving a contact surface which intersects with a thickness direction ofthe card-type storage device, a first restriction portion that restrictsa position of the card-type storage device in the thickness direction toa predetermined first position, a second restriction portion thatrestricts the position of the card-type storage device in the thicknessdirection to a predetermined second position which is different from thepredetermined first position, and a third restriction portion that linksthe first restriction portion and the second restriction portion, theslot device comprising: an urging portion that urges, when the card-typestorage device is inserted, the card-type storage device in thethickness direction; a second thermal contact that has a contact surfaceintersecting with the thickness direction of the card-type storagedevice, and is brought into contact with the first thermal contact; afirst guide portion that cooperates with the first restriction portionto restrict the position of the card-type storage device in thethickness direction to the predetermined first position; a second guideportion that cooperates with the first restriction portion to restrictthe position of the card-type storage device in the thickness directionto the predetermined second position; and a third guide portion thatlinks the first guide portion and the second guide portion.
 10. The slotdevice according to claim 9, wherein the card-type storage device isprovided with a first electrical contact for supplying power to thecard-type storage device, wherein the first electrical contact and thefirst thermal contact are arranged at the same position in the thicknessdirection, wherein the slot device further comprises a second electricalcontact that is brought into contact with the first electrical contactto supply power to the card-type storage device, wherein the secondelectrical contact has a spring property, and wherein the urging portionurges the card-type storage device in a direction opposite to adirection of a force generated when the second electrical contact isbrought into contact with the first electrical contact.
 11. The slotdevice according to claim 10, wherein an urging force applied by theurging portion is larger than a force applied by the second electricalcontact.
 12. The slot device according to claim 10, wherein in a statein which the card-type storage device is completely inserted into theslot device, the first to third restriction portions are separate fromthe first to third guide portions, respectively, and the first thermalcontact and the second thermal contact are in contact with each other.